| Acronym | Meaning |
 | MTC | Main Trunk Circuit |
| FAC | Facilities Advisory Council |
| AP | Action Plan |
| FFS | Flight Facilities Survey |
| NESC | National Environmental Satellite Center |
| ARC | Applied Research Corporation |
| WRL | Willow Run Laboratories |
| VEMAP | Vegetation And Ecosystem Modeling And Analysis Project |
| RCA | Request For Contract Action |
| WX | Weather |
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